CVE-2017-6743VulnerabilityPublished 03/03/2022Updated 10/24/2026

CVE-2017-6743: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability

Affects Cisco IOS and IOS XE SoftwareSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 03/03/2022
KEV deadline: 03/24/2022
EPSS: 10.9% chance of exploitation in 30 days – higher than 95% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2017-6743 (opens in a new tab)

Description

CVE-2017-6743 is a high-severity vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE software. It allows an authenticated remote attacker to execute arbitrary code on affected devices. This vulnerability has been exploited in the wild. No specific affected versions or patch information is provided in the available data.

Summary

The SNMP subsystem in Cisco IOS and IOS XE software contains a vulnerability (CVE-2017-6743) that permits an authenticated remote attacker to execute code remotely. This vulnerability is categorized under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer). Exploitation requires authentication, and active exploitation has been observed in the wild. No detailed version or patch information is included in the provided data.

Impact

An authenticated remote attacker can execute arbitrary code on affected Cisco IOS and IOS XE devices, potentially leading to full compromise of the device. This could disrupt network operations or allow further attacks within the network environment. The vulnerability has been exploited in the wild, indicating active threat activity targeting this flaw.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or workaround information is provided, users should consult Cisco's official advisories for updates and apply recommended fixes or mitigations as soon as they become available.

Weaknesses

CWE-119Buffer Errors (Memory Bounds) (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 10:40:27 UTC

Weaknesses

References

Related threats